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Lining material for rehabilitating existing pipe and method for rehabilitating existing pipe using same

A bushing and base material technology, applied in the field of bushing materials for repairing installed pipes and repairing installed pipes using the material, can solve the problem of excessive increase in viscosity of furan resin composition, increase in viscosity of furan resin, difficulty in ensuring Impregnation ability and other issues, to achieve effective and convenient thin thickness, high strength, low cost effect

Inactive Publication Date: 2012-12-12
SEKISUI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method exponentially increases the viscosity of the furan-based resin along with the decrease in moisture content, and makes it difficult to ensure sufficient impregnation ability, which is indispensable for the matrix resin as a laminate
[0010] In addition, restoration methods require strength characteristics that can withstand soil pressure, groundwater pressure, and live loads, but, in the case of furan-based resins, there is a problem that impregnation into base materials becomes difficult when trying to enhance strength characteristics by adding fillers. Difficulty due to excessive increase in viscosity of the furan resin composition

Method used

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  • Lining material for rehabilitating existing pipe and method for rehabilitating existing pipe using same
  • Lining material for rehabilitating existing pipe and method for rehabilitating existing pipe using same
  • Lining material for rehabilitating existing pipe and method for rehabilitating existing pipe using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] Only a furan resin component (a cocondensate of furfuryl alcohol and formaldehyde, a viscosity of 2700 mPa·s, and a moisture content of 7.4% by weight) was used as the furan-based resin.

[0118] Furthermore, after adding 3 parts by weight of a curing agent (65% p-toluenesulfonic acid aqueous solution) to 100 parts by weight of the furan-based resin, they were stirred at 1000 rpm for 10 minutes using a "Homodisper", Thus, a curable furan resin composition was prepared.

[0119] Inject 7500 g / m inside the base material of the tubular liner consisting of a tubular laminate covered on the outer surface with a water-impermeable layer 2 The curable furan resin composition, wherein the tubular laminate is made of resin non-woven fabric (polyester non-woven fabric, porosity 85%, and 460g / m 2 ) and resin non-woven fabric (polyester non-woven fabric, porosity 85%, and 600g / m 2 ) was made; then the inside of the base material was degassed by decompressing the inside of the base...

Embodiment 2

[0122] After adding 40 parts by weight of furfural to 100 parts by weight of the furan resin component (cocondensate of furfuryl alcohol and formaldehyde, with a viscosity of 2700 mPa·s and a moisture content of 7.4% by weight), it was dispersed in the Stir at 1000 rpm for 5 minutes to prepare a furan-based resin. After that, using the furan-based resin, a repaired underground pipe was obtained by a method similar to that in Example 1. The evaluation results are shown in Table 1.

Embodiment 3

[0124] After adding 50 parts by weight of furfuryl alcohol to 100 parts by weight of the furan resin component (cocondensate of furfuryl alcohol and formaldehyde, with a viscosity of 2700 mPa·s and a moisture content of 7.4% by weight), it was dispersed in the Stir at 1000 rpm for 5 minutes to prepare a furan-based resin. After that, using the furan-based resin, a repaired underground pipe was obtained by a method similar to that in Example 1. The evaluation results are shown in Table 1.

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Abstract

Provided are a lining material for rehabilitating an existing pipe, said lining material having a low density and very good impregnation properties in spite of having a low moisture content, and a method for rehabilitating an existing pipe, said method comprising lining the inner face of an aged existing pipe using the aforesaid lining material to thereby repair a pipeline. The aforesaid lining material for rehabilitating an existing pipe has a structure wherein a resin-absorbable base material, one surface of which is liquid-tightly film-coated, is impregnated with a curable furan resin composition containing a furan-based resin and a curing agent.

Description

technical field [0001] The present invention relates to lining materials for repairing installed pipes and methods of using the same for repairing installed pipes, and more particularly, the present invention relates to lining materials having low viscosity and very good impregnation properties regardless of low moisture content. Lining material for repairing installed pipes, and for repairing installed pipes by using the material to provide linings on the inner surfaces of aged (deteriorated) installed pipes, especially underground pipes The method has set the tube. Background technique [0002] In the case where installed pipes such as underground pipes buried in the ground, etc. (such as sewer pipes, water supply pipes, agricultural water pipes) deteriorate, various methods of repairing pipes by providing bushings on the inner surfaces of the pipes have been proposed and put into practical use. A method for repairing set tubes. [0003] As one of such repair methods, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C63/34F16L1/00F16L55/16
CPCB29L2023/006F16L55/1651B29C63/36F16L55/1656Y10T428/24802B29C63/34F16L1/00F16L55/16
Inventor 小林智行
Owner SEKISUI CHEM CO LTD
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